Add an example for doas(1) logging and drop sudo and chat.

ok tedu@ rep@

src/etc/syslog.conf

@@ -1,4 +1,4 @@
-#	$OpenBSD: syslog.conf,v 1.17 2005/05/25 07:35:38 david Exp $
+#	$OpenBSD: syslog.conf,v 1.18 2015/07/17 21:45:52 ajacoutot Exp $
 #
 
 *.notice;auth,authpriv,cron,ftp,kern,lpr,mail,user.none	/var/log/messages
@@ -31,10 +31,8 @@ mail.info						/var/log/maillog
 #*.notice;auth,authpriv,cron,ftp,kern,lpr,mail,user.none	@loghost
 #auth,daemon,syslog,user.info;authpriv,kern.debug		@loghost
 
-# Uncomment to log messages from sudo(8) and chat(8) to their own
-# respective log files.  Matches are done based on the program name.
+# Uncomment to log messages from doas(1) to its own log file.  Matches are done
+# based on the program name.
 # Program-specific logs:
-#!sudo
-#*.*							/var/log/sudo
-#!chat
-#*.*							/var/log/chat
+#!doas
+#*.*							/var/log/doas